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PROPAFENONE AND TERBINAFINE

Medical Diagnosis and Drugs, Medications
In vitro studies suggest that terbinafine is an inhibitor of CYP2D6. It may therefore be expected to increase the plasma levels of other drugs that are substrates of this enzyme, such as propafenone.
Until more is known it would seem wise to be aware of the possibility of an increase in adverse effects if propafenone is given with terbinafine and consider a dose reduction if necessary.
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